rdefino, We all learn and some learn the hardest to what's best to do for if you been doing a 30 gal water change a week and you had full control on your not over feeding in which means as well, dumping too much food at any one time for I mentioned that the type of filter you have is as the same as a canister filter and foods become trap in which not do your tanks nitrates any good.
For most, we all not use the same maintenance methods for also when we see that our tanks nitrates are rising that then you need to know that something needs to be change in your water changes, feeding and bio load. For its something that those who do keep a large bio load that your best to know that they either do some serious water changes or their loses are great.
Also, things at the start of ones tank always look good, but when you have loses and certain problems accuring you need to ask yourself if the setup you have should be needing some serious upgrading. Myself back in the early days of the hobby, I too wanted more then my tanks and filtration system could handle, But I also done every week on a 90 gal tank a 40% water change. Now we not had the pleasure of RO water back in the early 50`s. So what I use to do is had two 55 gal tanks in my garage running with carbon filters and water conditioner. But first I had only one 55 gal tank doing this and when I began requiring other tanks, I started a second one.
As for moving later when a larger tank, it will depend much on what are the sfe health conditions be. For as of right now from most of what im able to put together, the eel wont last that long>
Now I done this with many others when the situation be so bad or im not getting a point across as I would had like too. Which state you live in? Now im in NC and I had called other hobbyists in Fla, Texas, Calf, Maine and a number of other states as well. If you like, PM me your number and the best time to call. As of now for today, im home most the time and I not have the kids until after 4 PM my time in which is five hours away.